A CHELATE SORBENT PREPARED BY THE MODIFICATION OF LICHROPREP RP-8 WITH TITAN YELLOW AND ITS APPLICATION

Abstract

The new chelating sorbent for metal ions was prepared by impregnation of chemically modified silica LiChroprep RP-8 with ion pairs composed of cation of Aliquat 336 and anion of Titan Yellow. The hypothetical molecular mechanism of binding this ion pair by the surface of the applied carrier was presented. The sorbent was compared with analogous sorbent with plain silica carrier containing the same ion pairs. Higher stability of the new sorbent in comparison to that of the plain silica chelating sorbent was demonstrated. The sorbent obtained was applied for chromatographic separations of some chosen mixtures of metal ions and for additional purification of aqueous solutions of alkali metals from trace amounts of heavy metals.